[Bug 77201] New: Firefox textdisplay problems after update to xf86-video-intel-2.99.911

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77201

          Priority: medium
            Bug ID: 77201
          Assignee: chris at chris-wilson.co.uk
           Summary: Firefox textdisplay problems after update to
                    xf86-video-intel-2.99.911
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: 4607vrfcr84spd21f08 at weg-werf-email.de
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 97093
  --> https://bugs.freedesktop.org/attachment.cgi?id=97093&action=edit
excerpt of dmesglog

Hardware:
[url=http://www.intel.com/content/www/us/en/chipsets/mainstream-chipsets/chipset-855gm.html]Intel
855GM chipset[/url] with integrated graphics. Driver:
[url=https://www.archlinux.org/packages/extra/i686/xf86-video-intel/]xf86-video-intel[/url]

Software: Arch Linux

Driver versions

* xf86-video-intel-2.99.[b]911[/b]-1-i686
* xf86-video-intel-2.99.[b]911[/b]-2-i686 (current)

produce display errors on http://www.faz.net/ (and https://www.ixquick.com ) in
Firefox (using a fresh profile results in same error) under KDE4, TWM, openbox
and LXDE. See article text screenshot
[url]http://i.imgur.com/xV4sxni.png[/url]. Missing text lines, in the headlines
on hover, in the main text after load but more severe after scrolling a bit.
Everything else displays fine (images, firefox' GUI).

The error does also occur under another user account (with nearly standard
settings) in KDE4 (same computer). All packages up to date.

No errors with the older version xf86-video-intel-2.99.[b]910[/b]-1-i686 (to
which I have downgraded now). With this and the older versions I had no such
problems since months.

No errors in other programs like Chromium or Konqueror (but did not test that
much, Firefox is what I use often).

It seems to be similar to bug #36326 but the effect is much more severe and
appeared only in the last weeks while it worked before.

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